Brake-shoe key.



0. G. SEAMAN.

*BBAKE SHOE KEY. Arrmonxon FILED 1m. 2B, 1908.

Patented Jan. 19, 1909.

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o'Nrrnn STATES PAT ORR'IN G': SEAMAN, OF ALBION, PENNSYLVANIA, ASSIGNOBOE ONE-HALE TO GEORGE W.

NT EEICE.

LYON, or CBANESVILLE, PENNSYLVANIA.

BRAIIE-SI-IOE KEY.

To all whom it may concern:

Be it known that I, ORRIN G. SEAMAN, a citizen of the United States,residing at Albion, in the county of Erie and State of Pennsylvania,have invented certain new and useful Improvements in Brake-Shoe Keys;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, forming part of this specification.

My invention relates to keys for brakeshoes, and has for its object theproduction of a key for securing a brake-shoe in place, which can beeasily inserted and removed, and which when in place will firmly securethe brake-shoe to the head, so that it cannot become accidentallydisengaged there from, while at the same time it can easily be removedwhen it is desired to detach the brake-shoe.

In pursuance of these objects I make my improved key preferably ofspring steel, with a longitudinal slot therein and with slightprojections on its edges opposite the slot therein, so that when the keyis inserted into the brake-head the slot therein allows the edges of thekey opposite the slot to spring inward so as to allow the projectionsthereon to pass through the openings in the brake-head and shoe, andwhen it is in place to spring outward again, so as to engage thebrake-head and thus prevent its becoming accidentally displaced.

The features of my invention are hereinafter fully set forth andexplained, and illustrated in the accompanying drawings, in which:

Figure l is a side view in elevation of a brake-head and shoe showing myimproved key therein. Fig. 2 is a vertical section of the brake andbrake-shoe on the line 00-00 showing my key in elevation therein. 3 is aview in perspective of my improved brake-shoe key.

In these drawings illustrating my invention, A is an ordinarybrake-head; B a brake-shoe, and D the brake-shoe key. On the brake-headA there are the usual projections A A at its upper and lower ends,

Specification of Letters Patent.

Application filed. March 28, 1908.

Patented Jan. 19, 1909.

Serial No. &23,971.

and central projections A A between which central projections a lug B onthe brakeshoe B, extends when the ends of the brakeshoe contact with theprojections A A on the brake-head, and through the extensions .A A and AA? on the brake-head, and

the lug B on the brake-shoe there are slots (4 a, a a and b all of whichaline with each other, and through which the brake-shoe key is inserted.

The brake-shoe key E (Fig. 3) is made preferably of a fiat strip ofspring steel, somewhat thicker at its upper end 6 than at its lower end6, and at its upper end e it is provided with a rearwardly turned head Eadapted to be engaged by a pinch-bar inserted between it and thebrake-head when it is desired to remove the key. In this keyapproximately about one third of its length from the lower end 6thereof, I make an elongated slot 6 and centrally of said slot e I formslight rounded projections e e on the edges of the key, as is clearlyshown in Figs. 2 and 8, and as the key E is pressed into the slots a, aand b, the slot 6 allows the edges of the key opposite to theprojections 6 e to move toward each other until they pass down below thelowermost of the projections A on the brake-head A, after which theedges of the key will spring outward again and engage the lower side ofthe projection A as is illustrated in Figs. 1 and 2, so as to firmlyretain the key E from any upward movement, but if desired, a pinch-barcan be inserted between the head E of the key and the top of thebrake-head A, and the key E withdrawn therefrom.

Having thus described my invention so as to enable others to constructand use the same, what I claim as new and desire to secure by LettersPatent is:

1. A brake-shoe key having a longitudinal slot cut therethrough,intermediate of the ends thereof, both ends of said slot being closed,substantially as set forth.

2. A brake-shoe key having a longitudinal slot therein which will permitthe edges of the key opposite said slot to be sprung toward each other,and projections on the edges of the key opposite said slot,substantially as set forth.

3. A spring metal brake-shoe key having a longitudinal slot thereinintermediate of its length which will permit the edges of In testimonywhereof I atlix my signature, the key opposite said slot to be sprungtoin presence of two Witnesses.

Ward each other, substantially as set forth.

' LA spring metal brake-shoe key having ORRIN a longitudinal slottherein which will permit Witnesses: the edges of the key opposite saidslot to be GEO. W. LYON, sprung toward each other, and projections R. E.BRACE.

on the edges of the key opposite the slot in said key, substantially asset forth. a

